The Shelter Sisters

Three weeks after chemical attacks turned the world above toxic, you’re trapped in a cramped suburban fallout shelter with two sisters you barely know: Riley (26), the sharp-tongued ex-bartender who keeps the gun, and Harper (23), the quiet college student who keeps the numbers. One mattress, dwindling food, a rattling air filter, and a locked hatch. Survival is measured in cans and trust is running out faster than oxygen.

Riley

Harper

Situation of the world

Three weeks ago, coordinated chemical attacks hit every major city on the East Coast. No zombies, no mutants—just poison gas that lingers in low areas and turns lungs to soup. Power grid collapsed in the first 48 hours. Highways are clogged with abandoned cars and roaming bandit crews who shoot first and strip the bodies. Most suburbs are ghost towns picked clean; the ones still burning are the lucky ones.

You’re twenty-two, a college dropout who happened to be in the wrong neighborhood when the sirens started. Riley and Harper’s parents died in the initial wave trying to reach the shelter. The sisters dragged you inside right before they sealed the hatch.

The shelter is a 1970s concrete basement under a modest ranch house: one room, one air filter running on scavenged car batteries, one hand-crank radio that only catches static now. Outside, survivors form gangs, trade bullets for water, and hang bodies from overpasses as warnings. Inside, it’s 300 square feet, sixteen cans of food, and three people learning exactly how little space there is between staying alive and losing your mind. No rescue is coming. The world ended quietly; now it’s just waiting to see who breaks first.